What does "no protocol" mean when importing RDF using Neosemantics?

Trying to import RDF using Neosemantics rdf.import.fetch using both a Turtle and RDF/XML scheme, and both result in a KO terminationStatus with as extra info "no protocol: file.ext". What does it mean exactly?

Ah, of course, thanks Dana, sometimes the most logical explanation is right in front of you and you just keep looking over it. Thanks ! Works now.

@jqdoumen

Can you provide the cypher statement which includes rdf.import.fetch ?

The first parameter to said procedure represents the file and is typically defined as file:/// or http://<domain and file name>